EP0179627A2

EP0179627A2 - Variable data imprinter, e.g. for credit cards and the like

Info

Publication number: EP0179627A2
Application number: EP85307534A
Authority: EP
Inventors: James Carlisle Fisk
Original assignee: Individual
Current assignee: Individual
Priority date: 1984-10-19
Filing date: 1985-10-18
Publication date: 1986-04-30
Also published as: EP0179627A3; CA1237942A; US4628812A

Abstract

Apparatus for imrpinting variable data on a document (26) comprising:

a plurality of coaxially arranged type wheels (34) each having an axial opening (34a) and a succession of type faces on the wheel periphery;
support means (78) for rotatably supporting the type wheels (34) for contact with a document to be imprinted; and
positioning means (48,88,90) for rotatably positioning the type wheels (34), said positioning means (48,88,90) extending through the axial openings (34a) of the type wheels (34) to independently engage a selected type wheel; characterised by
index means (9₄,96,98,100) for indexing the positioning means (48,88,90) along the axis of the type wheels (34) to successively engage and rotatably position selected type wheels (34) and reset means (120,122) to simultaneously reset the type wheels (34) to a starting position, said reset means (120,122) extending through the axial openings (34a) C of the type wheels (34) for cooperating therewith.

Description

This invention relates to the field of data imprinters and, although it is not so restricted, it relates more particularly to data imprinters capable of imprinting variable data for use in recording credit card sales transactions.
Imprinters typically used in recording credit card sales transactions may be broadly classified as the type having variable data imprinting means and the type capable of only recording preset data contained on the imprinter and the credit card. An example of a credit card imprinter of the type which merely records the information on the credit card and the information on the dealer's plate affixed to the imprinter is shown in U.S. Patent Specification No. 3,810,424 (Barbour). The printer has a generally horizontal upper deck which supports the purchaser's credit card and a dealer plate affixed to the deck containing the dealer's name, address and identification code. The multi-ply credit card receipt is placed on the deck above the credit card and the dealer plate and then a roller is translated across the deck imprinting the raised indicia on the credit card and dealer plate onto the muffi-ply receipt The dollar amount or other cost of the sale and other information, such as the date and cardholder's signature, is then written on the receipt by hand.
A current trend in the industry is to use optical reading equipment to process the credit card receipts. Optical reading equipment cannot reliably read handwritten dollar amounts due to the wide variation in handwriting styles. It is therefore, necessary to imprint the dollar amount on the receipt with a type wheel if the receipt is to be automatically read by optical equipment. A number of credit card imprinters having dollar amount wheels which can be set by the user are presently available. An example of such a device is shown in U.S. Patent 3,739,716 (Barbour) which employs a number of toothed racks, each of which engage a gear formed on a rotating type wheel. The user positions the handle portion affixed to the rack to set the dollar amount of the transaction. Each of the type wheels acts independently of one another.
A problem with conventional credit card imprinters capable of printing variable data is that the devices tend to be bulky and occupy a great deal of counter space. Credit card imprinters are typically placed on a counter adjacent a cash register and the counter space is often very limited. In addition, imprinters having variable dollar amount type wheels are frequently expensive, as these mechanisms are relatively complex.
According therefore to the present invention, there is provided apparatus for imprinting variable data on a document, comprising:

a plurality of coaxially arranged type wheels each having an axial opening and a succession of type faces on the wheel periphery;
support meaftJ for rotalabty supporting the type wheels for contact with a document to be imprinted; and
positioning means for rotatably positioning the type wheels, said positioning means extending through the axial openings of the type wheels to independently engage a selected type wheel; characterised by
index means for indexing the positioning means along the axis of the type wheels to successively engage and rotatab- ty position selected wheels; and
reset means to simultaneously reset the type wheels to a starting position, said reset means extending through the axial openings of the type wheels for cooperating therewith.

In its preferred form, the apparatus of the present invention is an imprinter for credit cards which is quite small and compact. The compact size of the imprinter is achieved by the fact that the type wheels are indexed along the coaxially arranged type wheels, successively engaging each wheel for rotation to the desired position. Thus one positioning mechanism can thereby serve all of the type sheels, greatly reducing the size and complexity of the apparatus. In its preferred form,the imprinter also employs a reset rotor.
Like prior art devices, apparatus of the present invention may include a frame and means to press the document against the type wheels.
The means to press the document against the type wheels may comprise a carriage guided on recirculating ballbearings for translation through the length of the document. Attached to the carriage and pivotable along an axis generally perpendicular to the linear path of the carriage travel there may be a roller frame having one end for cooperating with the user, and the other end for rotatably supporting a roller along an axis parallel to the axis of the roller frame. The arrangement is preferably such that the force exerted by the user on the roller frame causes it to rotate, depressing the roller against the document and the supporting frame which has the type wheels projecting therethrough. On the return stroke, the roller frame and roller may be pivoted free of the document for an easy return motion.
The apparatus may also comprise a date setter mechanism used in conjunction with the date wheels, the said mechanism preventing the date wheels from being rotated more than one indicia at a time. A date setter may be positioned adjacent the date wheels, the date setter having individual date setter spring leaves for cooperation with each date wheel. The spring leaves may be depressed into contacting relationship with a date wheel, and the date wheel and date setter may be rotated to limit the movement of the date wheel to the next adjacent indicium.
The invention is illustrated, merely by way of example, in the accompanying drawings, in which:-

Figure 1 is a plan view of an apparatus according to the present invention for imprinting of variable data;
Figure 2 is an enlarged cross-sectional view of the righthand portion of the apparatus of Figure 1 taken along a line 2-2 of Figure 1;
Figure 3 is a cross-sectional view taken along line 3-3 of Figure ₁, and represents the lefthand portion of the apparatus not shown in Figure 2;
Figure 4 is a cross-sectional view taken along line 4-4 of Figure 2;
Figure 5 is Pr, enlarged true view of a finger ladder in the direction of arrow 5 as shown in Figure 4;
Figure 6 is a cross-sectional view of the said apparatus taken along line 6-6 in Figure 2;
Figure 7 is a righthand view of a carriage assembly shown in plan view in Figure 1;
Figure 8 is a cross-sectional view taken along line 8-8 of Figure 7;
Figure 9 is a view taken along lines 9-9 of Figure 7;
Figure 10 is a cross-sectional view of a date wheel assembly taken along line 10-10 in Figure 2;
Figure 11 is a perspective view of a date setter;
Figure 12 is a side view of a reset actuator;
Figure 13 is a side view of a reset rotor;
Figure ₁₄ is a perspective view of a shift pawl spring;
Figure 15 is a perspective view of the shift pawl;
Figure 16 is a side view of a shift ratchet;
Figure ₁7 is a perspective view of a bell crank; and
Figure 18 is a side view of a type wheel hub.

Terms such as "left" and "right", as used in the present specification, are to be understood to refer to directions as seen in the accompanying drawings.
Referring to the drawings, shown in Figure 1 is a plan view of a preferred embodiment of a variable data imprinter generally designated as 20. The variable data imprinter has a frame 22 provided with a generally planar document support surface 24 onto which a credit card receipt 26 may be supported. The document support surface is provided with a merchant identification plate 28, a region in which the customer's credit card is retained 30, an opening 32 through which type wheels 34 project, and an opening 36 through which date wheels 38 project. A carriage assembly ₄0 is shown in its leftmost position and is capable of translating in the direction of the arrow A for the length of the document support surface. The carriage assembly 40 is provided with recirculating ballbearing retainers 42 integrally formed in each edge thereof, which slidingly cooperate with frame rails 4₄ and 46 to make up a ball bearing assembly.
At one end of the variable data imprinter is located a finger ladder belt 48 which provides a means for the user to position the type wheels. Adjacent the finger ladder belt 48 and printed on frame 22 are indicia 50 corresponding to the raised indicia or type faces on type wheels 34. The user sets a type wheel by first positioning a pointer 52 to the leftmost place of the character sought to be imprinted. For example, if the amount to be charged is $12.50, the pointer 52 is moved to the fourth place from the right, i.e. the second place to the left of the decimal point. The user would then insert his/her finger in the recess 54 adjacent the number one and pull the finger ladder belt 48 forward in the direction of arrow B. The finger ladder belt works in a manner similar to a rotary type dial telephone, with the exception that the movement is linear rather than circular. When the user has advanced the finger ladder belt to the point where his or her finger is contacting the frame end portion 56, the finger is withdrawn and the ladder automatically returns. As the finger ladder belt is moved, a type wheel is rotated so that a raised indicium is exposed corresponding to that shown adjacent the recess in which the user's finger was initially placed. During the finger ladder belt return cycle, the pointer 52 automatically indexes to the next adjacent position to the right so that the next cycle of the finger ladder belt sets the next lower type wheel. In the example recited of $12.50, the user would set the pointer 52 to the fourth position from the right and then sequentially advance the finger ladder belt 1, 2, 5 and 0. With the dollar amount properly set, the credit card and credit card receipt 26 can be placed on the document support surface 24 and the carriage 40 translated across the credit card receipt, thereby imprinting the dollar amount shown on type wheels 3₄ as well as the information contained on the credit card and merchant's ID plate 28.
Since the date is not set as frequently as the dollar amount, disk-shaped cylindrical date wheels 38 are set manually individually by the user. A detent is provided so that the indicia located on the periphery of the date wheels line up property. Commonly, date wheels are turned with the user's fingernail or with the aid of a sharp object. A frequent problem arising is that the user may over-tum the date wheel. To solve this problem, adjacent each date wheel is a flexible fingerlike date setter finger 58 (Figures 10 and 11), the tip of which is visible through the date wheel opening 36 in Figure 1. A cross-sectional view of the date setter assembly is shown in Figure 2. Date wheels 38 are shown coaxially pivotably retained on the wheel shaft 60. Note that the raised indicia do not extend across the entire widths of the date wheels 38, as each date wheel is provided with a recessed shoulder 62. A cross-sectional end view of the date setter assembly taken along line 10-10 of Figure 2 is shown in Figure 10. Located about the periphery of each date wheel 38 is a series of raised indicia, either numbers or letters, which when combined can represent the date. A series of notches 64 are located in the recessed shoulder 62 for cooperation with a date wheel detent 66. The date wheel detent, like the date setter finger 58, is provided with a plurality of flexible elongated springy elements for cooperation with each of the individual date wheels. An enlarged perspective view of a date setter assembly 68 is shown in Figure 11. Both the date setter finger 58 and the date wheel detent 66 project into the recessed shoulders 62 and notches 64 and do not contact the raised indicia. The date setter assembly, having a plurality of date setter elements 58, is pivotably rotated on the shaft 60. The date setter assembly is held in the position shown in Figure 10 against a counter-clockwise stop by a date setter spring 70a(shown in Figure 2). The date setter assembly may be rotated clockwise against the date setter spring 70a.ln order to turn a date wheel one notch in the clockwise direction as viewed in Figure 10, an individual date setter element 58 is depressed into a corresponding notch 64 with a sharp object and the date setter assembly and the engaged date wheel may be rotated clockwise. A stop (not shown) provided on the date setter assembly limits the travel so that the date wheel may not be inadvertently turned too far. The date wheel detent element 66 is deflected away from the centre line of the shaft 60 as the date wheel is rotated and returns into the next adjacent notch 64 to hold the date wheel in proper angular orientation.
Referring to Figure 2 and Figure 4, the operation of the type wheel setting mechanism will be described, the said mechanism comprising a plurality of coaxially arranged type wheels 3₄ each having an axial opening 34A and a succession of type faces on the wheel periphery. The finger ladder belt 48 wraps about and is affixed to a wheel 70 which in turn is affixed to a type wheel set shaft 72, the shaft 72 constituting a means for rotatably supporting the type wheels 34 for contact with a document to be imprinted. The finger ladder belt 48 extends about an idler. As the finger ladder belt is moved linearly, the wheel 70 and the type wheel set shaft 72 rotate. A cross-sectional view taken along line 4-4 in Figure 2 of the finger ladder belt and wheel 70 is shown in Figure 4. A finger ladder belt back-up plate 74 extends parallel to and immediately below a linear run portion of the finger ladder belt 48 to provide a surface for supporting the user's fingertip. An enlarged view of a fragment of the finger ladder belt is shown in Figure 5 viewed along line 5-5 in Figure 4. Note that an opening 54 for the user's fingertip is provided adjacent each indicium or numeral 50 on frame 22. When the user inserts a finger in an opening adjacent a specific number, cycling the finger ladder belt will cause rotation of the wheel 70 an amount sufficient to orient a type wheel to the position where that same number is exposed through the type wheel opening 34.
The type wheels 34 are coaxially located immediately below the document support surface 24 as shown in Figure 2 and Figure 6. Each of the type wheels 34 are provided with an internal bore 76 for rotation about a hub 78. The hub 78 is generally tubular in shape and is provided with a lateral slot and a series of circumaxial slots extending about a portion of the periphery to define a plurality of hub fingers 80 in pairs as shown in Figure 6 and Figure 18. Each hub finger 80 is provided with a pointed tip 82 for cooperation with a plurality of notches 84 formed in the type wheel internal bore 76. The hub fingers 80 serve as a detent, allowing type wheel 34 to be rotated when the hub finger tension is overcome. When the tips 82 of the hub fingers 80 are engaged in the notches 84, the type wheel and indicia formed on the periphery of the type wheel will be held in proper alignment with the document support surface 24.
When viewing the end of the hub 78 in Figure 6, the lateral slot extending the length of the hub parallel to the hub axis, is represented by the space between a pair of hub fingers 80. Each type wheel 34 is provided with a dog 86 which projects into the type wheel internal bore 76. The dog 86 is of sufficient width to allow it to fit in the lateral slot formed between finger pairs 80 for assembly of the unit. The axial thickness of the dog 86 is sized to fit between hub fingers 80 and project into the internal cavity of the hub. In the preferred embodiment depicted in the drawings, the type wheel is designed to rotate approximately 135° and the circumaxial slots in the hub extend about a sufficient portion of the hub periphery to allow the necessary rotation of the dog 86.
The type wheel set wheel shaft extends through the hub 78 on which the type wheels 34 are rotatably mounted. Slidably affixed to type wheel set shaft 72 is a set slide 88. The set slide 88 is affixed to the shaft 72 in a manner allowing it to slide axially but not turn relative to the shaft. A suitable manner for accomplishing this connection is the lateral groove and notch as shown in the drawings, or any conventional spline. Th set slide 88 is provided with a tang 90 for cooperation with the dogs 86. The parts 88, 90 constitute a positioning means for rotatably positioning the type wheels 34, the said positioning means 88, 90 extending through the axial openings 34A of the type wheels 34 to independently engage a selected type wheel. The tang 90 has an axial dimension so that only a single dog may be acted upon at one time. The set slide 88 may be positioned axially along the shaft 72 so that the tang 90 will engage the dog of the type wheel desired to be set As shown in Figure 6, which is a cross-sectional view taken along line 6-6 in Figure 2, as the shaft 72 is rotated counter-clockwise, the set slide 88 and the tang 90 will rotate, causing the tang 90 to engage the dog 86, whereupon the type wheel will rotate relative to hub 78. A return spring 92 (Figure 4) causes the wheel 70 and the type wheel shaft 72 to return to its original position, and during this return motion the set slide 88 is automatically indexed axially along the shaft to position the tang 90 adjacent the dog of the next adjacent type wheel to the right
The mechanism for traversing the set slide for successive engagement with the selected type wheels comprises a shift ratchet 94 (Figure 2), a shift pawl 96, a bell crank 98 and a shift pawl spring 100. The parts 94, 96, 98, 100 constitute index means for indexing the positioning means 88, 90 along the axis of the type wheels 34 to successively engage and rotatably position selected type wheels 34. The shift ratchet 94 is rotatably affixed to set slide 88 at one end and slidingly cooperates with the type wheel set shaft 72 at the other. As the shift ratchet moves parallel to the
axis of the shaft 72, the set slide 88 is moved within the axial bore of the type wheels. The shift ratchet 94 is fixed in a manner so that it cannot rotate with the shaft 72. The shift ratchet is provided with a plurality of detents 102, shown in Figure 2 and in Figure 16. A shift pawl spring 100, shown in perspective view in Figure 14, is provided with a cantilever spring 104 having an end cooperating with a detent 102 in the shaft ratchet 94. The detents 102 are spaced so that the tang 90 on the set slide 88 will be positioned adjacent a dog on one of the type wheels. The shift ratchet 94 is also provided with a number of notches 106 having a spacing corresponding to the detents 102 and the type wheels 34. The shift ratchet notches 106 cooperate with the shift pawl 96. The shift pawl 96 also cooperates with the shift pawl spring 100 having an end portion 118 exerting a force on the shift pawl generally parallel to the shaft 72. The shift pawl 96 is pivotably attached to the bell crank 98 on pivot pin 110. The bell crank 98 is in turn essentially pivoted to the frame upon a bell crank pivot pin 112. The opposite end of the bell crank 98 is provided with a bell crank roller 114 for engagement with a cam 116 integrally formed into an intemal portion of the wheel 70. A cross-section of the cam 116 taken along line 4-4 in Figure 2 is shown in Figure 4. With reference to Figure 4, as the finger ladder belt is moved, the wheel 70 and the cam 116 rotate counter-clockwise, causing the bell crank roller 114 to initially move upwards in the direction of arrow C. When the finger ladder belt is released, the return spring 92 causes the wheel 70 to return to its original position as shown in Figure 4, allowing the bell crank roller 114 to drop down to the position shown. The return spring 92 is affixed to the wheel 70 at one end and to a lug 91, which is part of the housing, at the other end. An elastic stop 93 may be affixed to the lug or to the wheel to gradually decelerate the two relative to one another when the finger ladder belt is released by the user. The movement of the bell crank roller up and down on an arcuate path C, as shown in Figure 2, provides the forcible mechanical motion necessary for the shifting of the set slide 88 and the accompanying tang 90 to the next adjacent type wheel dog. Referring back to Figure 2, as the bell crank roller 114 is moved upward by the cam 116, the bell crank 98 rotates counter-clockwise causing shift pawl pivot pin 110 to move along an arcuate path. As the shift pawl pin 110 moves, the shift pawl end 118 moves initially on an arcuate path shown by arrow D to engage shift ratchet notches 106. The shift pawl spring end portion 118 exerts a force on the shift pawl spaced apart from the centre line of the shift pawl pivot pin 110, thereby causing the shift pawl to rotate clockwise as shown in Fiqure 2 when the bell crank roller 114 is moved upward. After the shift pawl end portion 108 engages shift ratchet notch 106, further movement of the bell crank roller 114 causes the shift pawl 96 to. move axially, allowing the shift pawl end portion ₁08 to engage the next notch on shift ratchet 94.
At the end of each setting cycle, the wheel 70 is returned to its initial position b" the return spring 92 and the shift pawl spring 100 returns tne shift pawl to the position shown in Figure 2 where the shift pawl end portion 108 is not contacting the shift pawl ratchets 106. The pointer 52, as previously described, is now free to set the set slide to the desired initial position so that the tang 90 cooperates with the dog on the first type wheel desired to be set. The pointer 52 is attached to the shift ratchet 9₄ so that the shift ratchet may be moved axially against the resistance caused by the cantilever spring 104 in a detent 102.
After all the type wheels have been set to the desired position and a credit card transaction recorded, it is necessary to return the type wheels to an initial zero position. To provide a means to reset the type wheels to a starting position, a preferred embodiment employs a reset rotor 120 shown in Figures 2, 3, 6 and 13. The reset rotor 120 is provided with a C-shaped cylindrical segment 122, extending through the internal bore in the hub 78 which in turn is within the internal bore 34g of the type wheels. The cylindrical segment 122 of the reset rotor is generally coaxial with the shaft 72, the set slide 88, the hub 78 and the type wheel bore 76, as shown in Figure 6. The cylindrical segment portion 122 of the reset rotor is shown in the initial starting position in Figure 6. The dog 86 is shown in the zero position. When located in the "9" position the dog would be adjacent the clockwise edge of the cylindrical segment 122. To reset the type wheels back to the zero position, the reset rotor is rotated in a clockwise direction as viewed in Figure 6, causing the reset rotor cylindrical segment 122 to engage the dogs 86 on all of the type wheels, causing them to be returned to the zero position shown. After the reset function is completed, the reset rotor is returned by the spring 134 to the position depicted in Figure 6, allowing sufficient space for the type wheel dog to rotate. In the preferred embodiment depicted, all ten numerals formed on the periphery of each type wheel 34 are located in a segment less than 180°; 135° as shown is satisfactory. Ample space must be provided so that dog 86 may rotate through a comparable angle. The reset rotor, in order to return the top wheel dogs to their starting position, must also be capable of rotating a like angle, i.e. 135° as shown in the drawings.
The reset rotor 120 is provided with a threaded end portion 124. The threaded reset rotor end portion 124 cooperates with a reset actuator 126. The threaded end portion 124 of the reset rotor is generally coaxial with the shaft 72 and the type wheel assembly. The threaded end portion of the reset rotor extends through a nut 128 formed on one end of the reset actuator. The reset actuator is fixed so that it cannot rotate about the centre line of the reset rotor. However, the actuator may translate linearly generally parallel to the axis of the reset rotor and of the shaft 72. As the reset actuator is translated linearly, the reset rotor is caused to rotate by the engagement of the reset actuator nut 128 with the threaded end portion of the reset rotor 124. The threaded end portion of the reset rotor ₁24 is provided with a thread which in the preferred embodiment as shown in the drawings has a pitch of three inches (7.62 cms) and a helix angle of approximately 30° relative to the reset rotor centre line.
The reset actuator 126 is also provided with an end 130 for engagement with the carriage 40 and ramp surface 132 of frame 22. During the carriage resetting motion, when the carriage is moving in the direction of arrow E in Figure 3, the comer of the carriage 40 contacts reset rotor actuator end 130. The reset actuator and carriage are caused to move together until the reset actuator end 130 engages the ramp ₁32 formed in the frame 22. The ramp 132 causes the reset actuator end 130 to deflect downward for a sufficient distance to cause the end to drop below the level of the carriage 40, at which time the actuator spring 134 causes the reset actuator to return to the position shown in Figure 3. When the carriage is translated during the document imprinting stroke, the reset actuator end 130 and the corresponding mating surface on the carriage are designed so that the reset actuator end is deflected down- sard to allow the carriage to pass freely.
Cross-sectional views of the carriage assembly 40 are shown in Figures 7 and 8. The carriage assembly is comprised of a carriage body 136, recirculating ballbearing retainers 42, roller frame 138 and roller 140. The roller 140 is free to rotate about an axis generally parallel to the document support surface 24 and perpendicular to the line of travel of the carriage 40. In the preferred embodiment as shown in the drawings, the roller 140 is pivotably attached to the roller frame 138 which in turn is attached to the carriage housing 136, adjustable along an axis generally perpendicular to the plane of the frame. The roller frame 138 is provided with threaded bosses 142 for receiving adjustment screws 144. By rotating an adjustment screw 1₄4, the roller frame 138 may be telescopically moved relative to the carriage body 136, compressing a wave spring 146 to adjust the roller to frame spacing. When the carriage as shown in Figure 8 is translated to the right, the frictional force exerted on the roller represented by the arrow F and the force exerted by the user causes the carriage body 136 to rotate clockwise causing the roller to be firmly pressed against the document support surface.
When moving the carriage in the opposite direction, i.e. to the left in Figure 8, the force would be in the opposite direction, causing the carriage body 136 to rotate clockwise, thereby minimizing the force of the roller against the document support surface. This novel feature not only allows the carriage to be moved easier in the return stroke, but automatically exerts the proper roller force on the document in spite of minor variations in the spacing between the carriage and document support surface caused by production tolerances.

Claims

1. Apparatus for imprinting variable data on a document

(26) comprising:

a plurality of coaxially arranged type wheels (34) each having an axial opening (34a) and a succession of type faces on the wheel periphery;

support means (78) for rotatably supporting the type wheels (34) for contact with a document to be imprinted; and

positioning means (48,88,90) for rotatably positioning the type wheels (34), said positioning means (48,88,90) extending through the axial openings (34a) of the type wheels (34) to independently engage a selected type wheel; characterised by

index means (94,96,98,100) for indexing the positioning means (48,88,90) along the axis of the type wheels (34) to successively engage and rotatably position selected type wheels (34); and reset means (120, 122) to simultaneously reset +¹ type wheels (34) to a starting position, said reset means (120,122) extending through the axial openings (34a) of the type wheels (34) for cooperating therewith.

2. Apparatus as claimed in claim 1 characterised in that said index means (94,96,98,100) automatically shifts the positioning means (48,88,90) successively from one type wheel (34) to the next in response to the rotatable positioning of each type wheel (34).

3.Apparatus as claimed in claim 1 or 2 characterised in that the positioning means (48,88,90) further comprises manually operable means (48) enabling a user to rotate the type wheels to desired positions.

4. Apparatus as claimed in any preceding claim characterised in that each type wheel (34) has a dog (86) extending into said axial opening for engagement with the positioning means (48,88,90).

5. Apparatus as claimed in claim 4 characterised in that the positioning means (48,88,90) comprises a rotatable set slide (88) having a tang (90) thereon for engagement with the dog (86) of a type wheel (34).

6. Apparatus as claimed in claim 4 or 5 characterised in that said reset means (120,122) comprises a rotatable reset rotor (120) a part (122) of which extends into the axial openings (34a) in the type wheels (34) for engagement with the type wheel dogs (86).

7. Apparatus as claimed in claim 5 characterised in that said set slide (88) is radially fixed to and slidable axially along a shaft (72).

8. Apparatus as claimed in claim 7 characterised in that said positioning means (48,88,90) further comprises return means (92) to return the said shaft (72) to the initial angular position after each setting operation.

9. Apparatus as claimed in any preceding claim characterised in that said support means comprises a tubular hub (78) having an internal cavity formed therein; an axial lateral slot; and a plurality of circumaxial slots extending about a portion of the periphery to define a plurality of flexible fingers (80) each having a tip adjacent said lateral slot; said axial openings (34a) of said type wheels (34) rotatably cooperating with said hub (78) so that the said type wheel dogs (86) project through said circumaxial slots and into said hub internal cavity.

10. Apparatus as claimed in claim 9 characterised in that the axial openings (34a) in said type wheels (34) are further provided with a plurality of spaced apart notches (84) for cooperating with said flexible fingers (80) formed in the hub (78) to provide detent means for maintaining the type faces properly aligned.

1₁. Apparatus as claimed in claim 3 and in claim 5 characterised in that the manually operable means (48) comprises a rotatable set shaft (72) for slidingly supporting said set slide (88) while preventing the relative rotation thereof; a wheel (70) affixed to said set shaft (72) having a peripheral edge,

a rotatable idler (49) having a peripheral edge aligned with said wheel (70) and having an axis parallel to hut spaced apart from said shaft

a flexible finger ladder (48) wrapped about a portion of said idler (49) and said wheel peripheral edges to define a linear run therebetween, said finger ladder (48) being provided with a plurality of recesses (54) for cooperating with the user's finger, whereby, as the user moves the finger linearly, said wheel (70) rotates causing the shaft (72), set slide (88) and the type wheel (34) in engagement therewith to be rotated to a location corresponding to the recess (54) in the finger ladder (48) in which the user's finger was inserted.

12. Apparatus as claimed in any preceding claim characterised by means to press the document (26) against the type wheels (34) to imprint the exposed type faces thereon, said means comprising a pair of guides (44,46) parallel to a document support surface (24); a carriage assembly (40) extending between said guides (44,46) having a pair of retainers (42) having recirculating bearing balls for cooperation with said guides (44,46) slidably retaining the carriage (40) thereto so as to be movable along a linear path parallel to said guides (44,46); and a roller (140) pivotably cooperating with said carriage assembly (40) rotatable along an axis parallel to said document support surface (24) and perpendicular to the linear path of said carriage assembly (40), said roller (140) cooperating with the document (26) to press the same against the document support surface (24) and the type wheels (34) exposed therethrough.

13. Apparatus as claimed in claim 12 characterised in that said carriage assembly (40) further comprises a carriage housing (136) centrally pivotably attached to said carriage assembly (40) and rotatable along an axis parallel to and spaced apart from that of said roller (140), one end of said carriage housing (136) pivotably supporting said roller (140) and the opposite end for cooperation with a user wherein the pushing of the carriage assembly (40) in one linear direction causes the carriage housing (136) to rotate and the roller (₁40) to press against the document (26) as the carriage assembly (40) moves along said linear path, and movement of the carriage assembly (40) in the opposite direction causes the carriage housing (136) to rotate relative to the carriage assembly (40) lifting the roller (140) away from said document support surface (24) as the carriage assembly (40) translates along said linear path.

14. Apparatus as claimed in any preceding claim characterised by a date wheel assembly wherein each date wheel (38) is provided with raised indicia about a portion of its periphery and may be independently set by the user, the date wheel assembly comprising a frame cooperating with the support means (78) of the type wheels (34); a pluraltiy of coaxially arranged cylindrical date wheels (38) pivotably attached to said frame, each date wheel (38) having a recessed shoulder (62) formed in the peripheral edge, said recessed shoulder (62) being further provided with a series of spaced apart notches (64) corresponding to the spacing of said raised indicia; a plurality of detent elements (58) attached to said frame for cooperating with said notches (6₄) in the date wheels (38) to retain the indicia on the date wheels (38) in aligned position; and a setter assembly pivotably attached to said frame for limited rotation about the date wheel axis, said date setter being provided with a plurality of flexible date setter fingers each having a free tip which can be deflected by the user from a non-cooperating position to a position engaging a notch in a date wheel recess shoulder, said setter assembly and engaged date wheel can thereby be rotated a predetermined amount corresponding to the angular spacing of said indicia.

₁5. An apparatus for imprinting variable data on a document, comprising in combination: a frame having a document support surface with a type wheel opening therein; a plurality of coaxially arranged type wheels each having a succession of type faces on a segment of the periphery, a central axial opening, and a dog projecting into said axial opening; a tubular journal having an outer diameter and an internal bore for rotatably supporting said type wheels below the frame support surface to expose the type faces through said opening, said journal_' having a plurality of axially spaced apart slots extending about a portion of said tubular journal through which the type wheel dogs extend so as to project into said internal bore: a rotatable set slide which extends into and traverses along the journal bore having a tang thereon for independently engaging a type wheel dog to rotate a type wheel to the desired position; means to couple the said slide to a user for individually setting the type wheels to the desired position; means to automatically advance the said slide to the next adjacent type wheel after a wheel has been set to the desired position; means to press the document against the type wheels to imprint the exposed type faces thereon; a rotatable reset rotor extending through the tubular bore for engagement with the type wheel dogs to return the type wheels to a starting position; and means to manually position the set slide adjacent any desired type wheel.